Table 1. COVID-19 outpatient and emergency room, clinic and intensive care admission indications according to the Republic of Turkey Ministry of Health clinical guidelines[32].

Disease stage	Hospitalization department	The clinical picture seen with COVID-19 (+) positivity
Patients with uncomplicated disease presentation	General Ward	a. There are findings like fever, muscle/joint pain, cough, sore throat and nasal congestion, there is no respiratory distress or tachypnea, SpO2 level in room air is not below 93%
		b. Patients have no underlying comorbidities (primarily cardiovascular diseases, DM, HT, cancer, chronic pulmonary diseases and other immunocompromised states) and are below 50 years of age
		c. There are no adverse prognostic criteria in blood samples obtained at the time of admission (blood lymphocyte count <800/μL or CRP>40 mg/L or ferritin >500 ng/mL or D-Dimer >1000 ng/mL, etc.),
		d. Patients with normal lung X-ray and tomography
Patients complying with mild pneumonia/severe pneumonia definitions	General Ward	a. There are findings like fever, muscle/joint pain, cough, sore throat and nasal congestion, respiratory rate is <30/min), SpO2 level is above 90% in room air
		b. Patients have no underlying comorbidities (primarily cardiovascular diseases, DM, HT, cancer, chronic pulmonary diseases and other immunocompromised states) and are below 50 years of age,
		c. There are no adverse prognostic criteria in blood samples obtained at the time of admission (blood lymphocyte count <800/μL or CRP >40 mg/L or ferritin >500 ng/mL or D-Dimer >1000 ng/mL, etc.),
		d. Patients with findings of mild pneumonia on lung X-ray or tomography
Hospital admission indications for patients complying with mild pneumonia/severe pneumonia definitions	Intensive care	a. There are findings like fever, muscle/joint pain, cough, sore throat and nasal congestion, tachypnea (≥30/min) is present, SpO2 level is below 90% in room air
		b. Blood samples obtained at the time of admission have adverse prognostic criteria (blood lymphocyte count <800/μL or CRP >40 mg/L or ferritin >500 ng/mL or D-Dimer >1000 ng/mL, etc),
		c. Patients with findings of bilateral pneumonia on lung X-rays or tomography
Severe pneumonia	Intensive care (advanced level)	a. Presence of dyspnea and respiratory distress
		b. Respiratory rate >30/min
		c. PaO2/FiO2 100/min
		d. Development of acute organ dysfunctions like acute renal failure, acute abnormality of liver function tests, confusion, acute hemorrhagic diathesis and immunocompromised patients
		e. Troponin elevations and arrhythmia
		f. Lactate >2 mmoL
		g. Capillary return abnormality and presence of skin disorders like cutis marmorata
DM: Diabetes mellitus; HT: Hypertension; CRP: C-reactive protein; SpO2: Oxygen saturation; PaO2: Partial pressure of arterial oxygen; FiO2: Fraction of inspired oxygen.